Propellendi

Propellendi is a class of light fictional propulsion systems that are conceptually based on a combination of electromagnetic forces and highly energetic propellants. Such systems are typically used in speculative or narrative contexts to describe novel methods of space travel.

Propellendi are often depicted as small, handheld devices that generate high-speed exhausts to propel a spaceship or other vehicle. They may be powered by various forms of energy, including superconductors, exotic matter, or even advanced forms of traditional fuels. Another key feature of propellendi is their ability to focus electromagnetic forces to accelerate the propellant to high speeds, creating a thrust-to-weight ratio that is superior to many conventional propulsion systems.

Theoretical discussions of propellendi often focus on the possibility of achieving high specific impulse (efficiency) and high thrust-to-weight ratios, potentially making them suitable for both in-atmosphere and in-orbit operations. Some proponents of propellendi also argue that they could potentially generate a field effect that would stabilize the spacecraft during flight or reduce harmful radiation effects.

Notable examples of propellendi in science fiction and futuristic concepts include fictional devices from writings by authors such as Arthur C. Clarke, Robert A. Heinlein, and Jules Verne, which have developed these concepts and better explain some of the theoretical principles behind such a concept. However, experimental or theoretical work on the physical feasibility or practical applications of propellendi remains an open topic for study and development.

While real-world propulsion systems are already relatively advanced, some researchers and engineers are exploring new approaches to high-efficiency propulsion, including conceptual studies of advanced principles and materials. Addressing various fundamental limitations may also become an essential step toward propellendi or similar systems to accomplish competitive goals of space travel.